package com.sky.aspect;


import com.sky.anno.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;


/**
 * 公共字段自动填充切面类
 */
// 声明切面类
@Aspect
@Slf4j
@Component
public class AutoFillAspect {

    @Before("@annotation(com.sky.anno.AutoFill)")
    public void autoFill(JoinPoint joinPoint) {
        log.info("aop：根据注解autofill填充更新时间，创建时间，创建人，更新人属性");
        //     获取目标方法上的注解
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();// 方法签名
        Method method = methodSignature.getMethod();// 方法对象
        AutoFill autoFill = method.getAnnotation(AutoFill.class);// 获取注解对象
        OperationType operationType = autoFill.value();//获取使用注解时，设置的值
        //     获取目标方法的参数对象
        Object[] args = joinPoint.getArgs();
        if (args == null && args.length == 0) {
            return;
        }
        Object entity = args[0];// 拿到员工对象或者实体对象
        try {
            if (operationType == OperationType.INSERT) {
                //     判断属性值，insert就补充更新时间，创建时间，创建人，更新人属性
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateTime.invoke(entity, LocalDateTime.now());
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setCreateUser.invoke(entity, BaseContext.getCurrentId());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());
            } else {
                //     如果是update就补充更新时间，更新人
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }

}
